Ms Bolter, formerly Miss Ahmed, claimed she was a student at Wadham College

Natasha BolterPhoto: REX/Ray Tang

By Luke Heighton, Steven Swinford and Tom Brooks-Pollock

11:00PM GMT 10 Dec 2014

The credibility of the woman at the centre of the Ukip sex scandal has been dealt a further blow after Oxford University rejected claims that she had attended the prestigious institution.

Natasha Bolter, who has accused Ukip's General Secretary of sexually harassing her, was lauded when she joined the party after claiming she had secured a degree in politics, philosophy and economics at Wadham college.

The high-profile Ukip candidate, who defected from Labour earlier this year, was introduced at the party's Doncaster conference in September as having five A's at A-Level and an Oxford degree.

But Oxford University yesterday took the rare step of saying that it could find no evidence that she had ever studied there.

Ms Bolter accused Roger Bird, the party's general secretary, of making an indecent proposition on the day he assessed her suitability as a candidate. She quit the party and Mr Bird was suspended pending an internal inquiry.

However, The Telegraph understands that senior Ukip figures expect the investigation to find in favour of Mr Bird after he released a cache of more than 100 text messages showing he did "nothing wrong".

Mr Bird said that the messages from Ms Bolter, which included one which said "I love u and miss u and think u r sort of perfect", were evidence that they had been in a consensual relationship.

A senior Ukip source said: "What is increasingly clear is that this is an argument between two people. As the day has progressed it has become less and less of a Ukip story.

"It looks likely that the case against Roger Bird will be dismissed, there are questions about her credibility as a witness."

Mr Bird introduced Ms Bolter at the Ukip party conference in September, where he repeated her statement about her qualifications:“Natasha is someone else who has recently joined Ukip from the Labour party.

“Natasha was brought up in the Mile End Road in East London. She went to a local comprehensive school and nowadays teaches in a local comprehensive school in East London.She got five A-grade A levels and went on to read PPE at Wadham college, Oxford.”

It is understood that Ms Bolter repeated the claims about her time at Oxford University in an unpublished interview with a national newspaper.

But a spokesman for the university said: "We've recently seen an interview transcript in which Natasha claimed to have attended Wadham and can therefore confirm that Oxford University has no record of a Natasha Ahmed [Ms Bolter's maiden name] with a birthday of 12 July 1975 having attended Oxford."

There were also questions about Ms Bolter's age. In an interview her age was stated as 35, but according to official records she is 39.

Ms Bolter said: “I was a Labour Party activist. I joined because I supported their principles, that grew from the trade unions.

“Labour began as the party of the working class – this is not what I found.”

But the Telegraph can reveal the divorced mother-of-five was only a Labour member for a mere eight months, after June 2013 until the middle of 2014, according to sources inside the party.

Nor was she a full-time teacher. Instead she was a supply teacher at Eastbury Comprehensive School, East London, Barking and Dagenham council officials confirmed.